Sample-taking device.



R. D. DODDS.

SAMPLE TAKING DEVICE.

APPLlCATlON FILED APR-2, 1911.

Patented Aug. 7, 1917.

VEN TOR. AM

enr ch.

' REnns n. norms, on HUMBLE, TEXAS.

SAMPLE-TAKING DEVICE.

To all whom it may concern:

Be it known that I, REDUs D. DoDDs, a

citizen of the United States, residing at Humble, in the county of Harris and State of Texas, have invented certain new and useful Improvements in Sample-Taking De vices, of which the following is a specification.

This invention relates to new and useful improvements in a sample taking device.

The object of the invention is to provide a device of the character described to be used for obtaining samples of the formation through which the drill bit passes as the boring of the well progresses.

In drilling wells, particularly oil wells, it is often desirable to obtain samples of the formation through which the bit is passing for the purpose of determining the presence or absence of oil or other minerals. This device has been provided for obtaining-accurate samples of said formation at any depth and withdrawing the same to the surface during the process of drilling a well.

With the above and other objects in view the invention has particular relation to certain novel features of construction, arrangement of partsand use, an example of which Fig. 2 is a transverse sectional view of the device, taken onthe line 22 of Fig. 1.

Fig. 3 shows a vertical sectional view of an implement employed for lowering the device into the well, and

Fig. 4 is a vertical sectional view of a fishing tool for withdrawing the device from the well.

Referring now more particularly to the drawings, wherein like numerals of reference designate similar parts in each of the fig ures, the numeral 1 refers to a tubular drill stem having the bit 2 secured upon the lower end thereof and provided with water passageways as 3 on each side, said passageways extending from the upper end of the bit downwardly and terminating at the sides thereof to permit water from the interior of the drill stem to reach the points of the bit and to carry the cuttings away from said points The bit also has a vertical bore 4 therethrough for a purpose to be hereinafter stated. 1

' The numeral 5 refers to a tubular barrel Specification of Letters Patent.

in position, this barrel extends through the bore 4 of the bit, fitting closely therein and to the lower end thereof is screwed the boring tool 11 whose lower end has auger-like blades 12, said boring tool being in advance of the bit 2 and by the rotation of said blades forcing the formation up, into the barrel 5, passing between said blades. The passageways between the blades are controlled by suitable gate valves, each valve being anchored at one side to the blade and having its other side free and normally resting upon the other blade so as to permit the passage of the formation up into the barrel but to prevent its passage in the opposite direction out from the barrel between the blades, as shown. in Fig. 2. The barrel has two outwardly projecting shoulders 13 arranged on opposite sides thereof which engage in opposing recesses 14 in the bit 2 and are held securely seated therein by means of the flexible fingers 15 whose upper ends are secured to the inner sides of the drill stem and whose lower ends are free and engage against the upper side of the annular shoulder 16, of the barrel, when said barrel is lowered into position. As the formation is forced up into the barrel by the rotation of the blades 12, the water in the barrel is forced up through the valve seat 8 and passes out through the orifices 10 and when the device is withdrawn from the drill stem, the valve 9 closes and the formation is held trapped in the barrel 5 and may be withdrawn to the surface. For the purpose of its detachment from the spider. The lower end of the rod carries a frame 22 to opposite sides of which are pivoted the levers 23, 23, the lower end of said levers being turned inwardly forming the fingers 24, 24, provided to engage in the groove 7 of the head 6. The upper ends of these'leversare arcuate in form, being. curved outwardly and in Patented Aug. '7, 1917. Application filed April 2, 1917. Serial No. 159,247.

' eration in-the drill stem.

shown in Fig. 4.

terposed between them is the push, spring 25 provided to hold the fingers 24 in engagement in said groove. In order to lower the device into the well, the fingers 24 are engaged over said head as shown in Fig. 3 and the entire device then lowered through the medium of the'tube 17, the head 21 engaging against the spider 18. When the shoulders 13 have seated in the. recesses 14. and the fingers 15 have engaged against the shoulders 16 to secure said device in position, the tubing 17 is forced farther downwardly and will pass over the upper ends of the levers 23, 23, and forcethem. together disengaging 1 the fingers 24 from the head 6 and the catches 25', 25, carried by the outer sides of the upper ends of said levers 23 engage in corresponding recesses 26, 26, in the inner side of the lower end of the tube 17 and the 2 implement may then be lifted out of the well leaving the device in position for op- In Fig. 4 Ifhave shown a tool for withdrawing the device from the 25 drill stem, after the samples of the formation have been trapped in the barrel 5. This tool consists of a casing 27 whose upper end is reduced, forming 'a bearing 28 and provided with fluid outlets 29., A stem 30 op- 30 crates through said bearing to the upper end of which, the cable 31 is attached. To. the lower end of this stem is secured a hood 32 of a size and form to fit over the'head 6, said hood being provided with a bushing 35 33 forming a close fit with the casing 27.

Flexible fingers, 34, 34, are secured at their lower ends to the inner side of the hood and their upper ends are free. The lower end of the casing is provided with a plurality'of I 40 flexiblefingers 35 secured to said casing and whose inner ends overlap as shown in Fig. 4. The fishing tool is let down into the drill stem by means of the cable 31 until it rests upon the bit 2. The flexible fingers 5 15, 15, will be thereby disengaged from the shoulder"16 and the weight of the hood 32 and the stem 30 causes-said hood to pass over said head 6 and the free ends of the fingers 34 will engage under said'head as An upward pull upon the cable 31'will draw the barrel 5 upwardly until the lower end of the tool 11 passes above the flexiblefingers 35 and said fingers will drop back and engage under said tool and the entire device may then be withdrawn from the .well through the instrumentality of the cable 31. a

What I claim is: 1.The combination with a rotary drill stem having a drill bit secured to the lower end thereof, said bit being provided with a bore, of a tubular barrel secured in said stem and projecting through said bore be- 1 form of fishing low the bit and imeans'carried by the lower end of the barrel for forcing material into the barrel as the device rotates. a

2. The combination with a drill stem, of a bit attached to the lower end thereof having a central bore, a tubular barrel passing through said bore and fixed relative to the' stem-and a tool carried .by the lower end of said barrel, by the rotation of which theearths formation, through which said tool is passing,v is forced into said barrel.

' 3. The combination with a drill stem and. a bit secured thereto having a central bore, of a tubular member fixed in said stem and extending through said bore below the bit, aboring tool carried by the lower end of' saidmember and a valve within said mem-' ber permitting the passage of fluid upwardly 'therethrough.

4. The combination with a drill stem and bit attached thereto, said bit having a vertical bore, of a tubular member secured in "the stem 'and extending through said bore whose'lower end is formed into a boring tool by the rotation of which the formation,

through which said tool is passing is forced 1nto said member and means carried by the member and engaging withsaid bit whereby the former is forced to rotate with the latter.

5. The combination with a drill stem having a drill bit attached to the lower end thereof provided with a central'bore, of a tubular member projecting through said bore and extending below the bit and hav-' ing its lower end formed into a boring tool, a valve within said member permitting the flow of fluid upwardly therethrough and means for detachably securing said memher in position in said stem. 6. The combination with a drill stem having a bit attached to the lower end thereof, provided with a bore, of a tubular barrel fixed in said stem and projecting through said bore belowv the'bit the lower end of said barrel being formed into a boring tool, by the rotation of which the formation through which said tool is passing is forced into the barrel. j

7. The combination with a drill stem having a boring tool attached to the lower end thereof, of a tubular barrel fixed in said stem and extending through said borin'g tool- HSCLAHMER 1,235,883. Redus D. Dodds, Humble, Tex. SAMPLE-TAKING DEVICE. Patent dated August 7, 1917. Disclaimer filed June 30,1932, by the assignees, George J. Barrett, Sosthene Robichaux, and Wm. J. Miller, and the sole and excluslve licensee, Reed Roller Bit Company.

Severally and jointly make disclaimer of such parts of the thing patented as they do not choose to claim or hold by virtue of the 'patent or their respective rights, titles and interests therein, as follows To the subject matter of claims 1 to 7, inclusive, of said patent except as applied to drills of the class described in the specification, wherein the tubular barrel or tubular member specified in said claims is removable through the drill stem.

[Ofiez'al Gazette July 19, 1.932.] 

